bq76PL102 www.ti.com .......................................................................................................................................... SLUS887A – DECEMBER 2008 – REVISED OCTOBER 2009 PowerLAN™ Dual-Cell Li-Ion Battery Monitor With PowerPump™ Cell Balancing FEATURES 1 • Monitors up to Two Individual Cell Voltages and Temperatures • Part of a Complete Low-Cost Solution for Battery Packs of up to 12 Series and One or More Parallel Cells (When Used With bq78PL114). • Advanced PowerPump™ Balancing Technology Equalizes Cells in Li-Ion Battery Packs, Resulting in Longer Run Time and Cell Life. • PowerPump™ Cell Balancing Transfers Charge From Cell to Cell During all Operating Conditions – No Wasteful Current Bleeding or Associated Heat Buildup. • Unique PowerLAN™ Isolated Communications Technology Permits Simultaneous Measurement of All Individual Cell Voltages in a Series String. • Low Current Consumption: – <250 µA Active – <35 µA Standby – <1 µA Undervoltage Shutdown • Connects Directly to Cells, No Resistive Dividers • Internal LDO Regulator for Support Circuitry • Ultrasmall Footprint, 3-mm × 3-mm • Millivolt Measurement Resolution Using Delta-Sigma A/D Converter • Self-Calibrating Time Base – No Crystal Required When Used With bq78PL114 2 APPLICATIONS • • • • Uninterruptible Power Supplies (UPS) Portable Medical and Test Equipment Electric Bikes and Mild-EV Battery Packs Multicell Series Strings ≥ 5S RELATED DEVICES • bq78PL114 Master Gateway Battery Controller DESCRIPTION The bq76PL102 PowerLAN dual-cell battery monitor is part of a complete scalable battery management system for use with arrays of up to 12 Li-Ion rechargeable cells. The bq76PL102 connects to one or two cells in a series string, performs voltage and temperature monitoring of each individual cell, and reports these parameters over the PowerLAN communication network. Together with a bq78PL114 master-gateway battery controller, the bq76PL102 forms a complete battery monitoring and management system for higher cell-count applications. Partitioning of the battery monitor function on a per cell basis permits connection and measurement close to the cell. This results in superior accuracy and management over competing solutions. This scheme also facilitates the PowerPump cell balancing system, a technique which actively balances capacities of Li-Ion batteries without the excessive heat or limitations of bleed-balancing techniques. The bq76PL102 PowerPump cell balancing technology uses a charge-transfer methodology which does not bleed off excess energy as heat, but instead moves energy dynamically from cell to cell as needed. Balancing is performed during all battery operational modes – charge, discharge, and rest. Balancing is automatically coordinated between all cells on a PowerLAN system. PowerPump balancing technology results in longer run time and longer cell life. The PowerLAN communications architecture has been engineered to provide robust communications in tough EMI/RFI environments while avoiding the excessive power draw, high parts count, and elevated cost of other solutions. PowerLAN permits easy scalability using series connections of bq76PL102 dual-cell battery monitors. High-cell-count battery systems of up to 12 series cells are easily constructed without complicated high-voltage cell measurement restrictions. The bq76PL102 works with master-gateway battery controller. the bq78PL114 1 2 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. PowerPump, PowerLAN are trademarks of Texas Instruments. PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Copyright © 2008–2009, Texas Instruments Incorporated bq76PL102 SLUS887A – DECEMBER 2008 – REVISED OCTOBER 2009 .......................................................................................................................................... www.ti.com This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with appropriate precautions. Failure to observe proper handling and installation procedures can cause damage. Typical Temp Sensor V1 D-S A/D XT1 Typical Temp Sensor 2.5 V LDO PowerPump™ Balancing Logic Internal Temperature PUMP2N + Cell Balancing Circuits Vref VLDO Oscillator XT2 + PUMP2S PUMP1N PUMP1S VSS SDO V2 D-S A/D Control Logic SDI PowerLAN™ Communications ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more susceptible to damage because very small parametric changes could cause the device not to meet its published specifications. B0345-01 Figure 1. bq76PL102 Simplified Internal Block Diagram 2 Submit Documentation Feedback Copyright © 2008–2009, Texas Instruments Incorporated Product Folder Link(s) :bq76PL102 bq76PL102 www.ti.com .......................................................................................................................................... SLUS887A – DECEMBER 2008 – REVISED OCTOBER 2009 Pack Positive SMBus Pack Negative – + Pack Protection Circuits and Fuse Example 8-cell configuration shown PowerLAN Communication Link RSENSE PowerLAN Master Gateway Battery Controller bq78PL114 bq76PL102 Cell Monitor With PowerPump Balancing bq76PL102 Cell Monitor With PowerPump Balancing B0332-01 Figure 2. Example Multicell PowerLAN System Implementation AVAILABLE OPTIONS The bq76PL102 is currently available in a 3-mm square QFN-16 package, bq76PL102RGT, with a rated operational temperature range of –40°C to 85°C. (See Figure 5 for specific package information, dimensions, and tolerances.) • Order bq76PL102RGTT for 250 quantity, tape and reel • Order bq76PL102RGTR for 3000 quantity, tape and reel Submit Documentation Feedback Copyright © 2008–2009, Texas Instruments Incorporated Product Folder Link(s) :bq76PL102 3 bq76PL102 SLUS887A – DECEMBER 2008 – REVISED OCTOBER 2009 .......................................................................................................................................... www.ti.com TDI 3 SDI 4 V1 XT1 XT2 13 Thermal Pad 5 6 7 8 PUMP2N 2 14 PUMP2S VLDO 15 PUMP1N 1 16 PUMP1S VSS VPP RGT Package (Top View) 12 V2 11 TMD 10 TCK 9 SDO P0019-06 Figure 3. bq76PL102 Pinout (Top View) CAUTION: This device is subject to damage from Electrostatic Discharge (ESD). The device should be stored and handled using appropriate ESD precautions to prevent damage to the internal circuitry. PIN FUNCTIONS PIN NAME NO. I/O (1) DESCRIPTION (2) PUMP1N 6 O Charge-balance gate drive for cell 1 north PUMP1S 5 O Charge-balance gate drive for cell 1 south PUMP2N 8 O Charge-balance gate drive cell 2 north PUMP2S 7 O Charge-balance gate drive cell 2 south SDI 4 I PowerLAN serial data input from lower south, downstream part SDO 9 O PowerLAN serial data output to north, upstream part XT1 14 IA External temperature sensor 1 input (calibrated 50 µA) XT2 13 IA External temperature sensor 2 input (calibrated 50 µA) TCK 10 NC Do not connect TDI 3 NC Do not connect TMD 11 NC Do not connect V1 15 IA Midpoint cell connection (cell 1 positive and cell 2 negative) V2 12 P, IA VLDO 2 P Low-dropout regulator output – connect to VPP (bypass with 4.7 µF capacitor) VPP 16 P Connect to VLDO VSS 1 P Connect to most-negative cell voltage (cell 1 negative) — P Thermal pad – connect to VSS (1) (2) (3) 4 Connect to most-positive cell voltage (cell 2 positive) (3) I - input, IA - analog input, O - output, P - power, NC - no connect Cell numbering convention is from more-negative (cell 1) to more-positive (cell 2) and is locally referenced. When there is an odd number of series cells in a battery pack, connect pin V2 of the topmost bq76PL102 to pin V1 of the same bq76PL102. Submit Documentation Feedback Copyright © 2008–2009, Texas Instruments Incorporated Product Folder Link(s) :bq76PL102 bq76PL102 www.ti.com .......................................................................................................................................... SLUS887A – DECEMBER 2008 – REVISED OCTOBER 2009 ABSOLUTE MAXIMUM RATINGS over operating free-air temperature range (unless otherwise noted) (1) VALUE UNIT TA Operating free-air temperature (ambient) –40 to 85 °C Tstg Storage temperature –65 to 150 Voltage on SDO Note: not VSS-referenced Voltage on SDI Limited by lower cell voltage Voltage on V1 (V1 – VSS) (2) Maximum cell voltage Voltage on V2 (V2 – V1) (2) (V1 – 0.5) to (V2 + 0.5) With respect to VSS ESD tolerance JEDEC, JESD22-A114 human-body model, R = 1500 Ω, C = 100 pF (1) (2) V (VSS – 0.5) to (V1 + 0.5) (2) V –0.5 to 5 V Maximum cell voltage (not VSS-referenced) Voltage on XT1 or XT2 °C (2) –0.5 to 5 V (VSS – 0.5) to (V1 + 0.5) V 2 kV Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating Conditions is note implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. Cell numbering convention is from most negative (Cell 1) to most positive (Cell 2) and is locally referenced. ELECTRICAL CHARACTERISTICS TA = –40°C to 85°C (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT Two-cell configuration 2.5 3.6 4.5 One-cell configuration (2) 2.8 3.6 4.5 250 350 µA 32 50 µA 10 30 µA 0.5 1 µA DC CHARACTERISTICS VCELL (1) ( 2) Cell voltage input IDD Operating current (cell 2) Measuring, reporting, or balancing ISTBY Standby-mode current (cell 2) Idle ISHIP Ship-mode current (cell 2) IUVM (3) Cell extreme undervoltage-mode current (cell 2) VStartup Minimum startup voltage, V1 and V2 V1 < 2.8 V 2.9 V V CELL VOLTAGE MEASUREMENT CHARACTERISTICS V1 measurement range 2.75 4.5 V2 measurement range 2.75 4.5 Analog resolution <1 25°C Accuracy (after calibration) ±3 Measurement temperature coefficient ±7 mV µV/°C +150 Conversion time (5) V mV ±10 (4) 0°C to 85°C V 80 ms 85 °C INTERNAL TEMPERATURE MEASUREMENT CHARACTERISTICS Measurement range –30 Resolution Accuracy (after calibration) 0.1 (4) 0°C to 85°C Temperature coefficient (1) (2) (3) (4) (5) °C ±2 +1.28 °C mV/°C For single-cell operation, V1 must be connected to V2. During operation after power up Condition forced by bq78PL114 With respect to voltage shift induced by temperature coefficient at 85C. Does not include delay due to internode timing delays. Submit Documentation Feedback Copyright © 2008–2009, Texas Instruments Incorporated Product Folder Link(s) :bq76PL102 5 bq76PL102 SLUS887A – DECEMBER 2008 – REVISED OCTOBER 2009 .......................................................................................................................................... www.ti.com ELECTRICAL CHARACTERISTICS (continued) TA = –40°C to 85°C (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT EXTERNAL TEMPERATURE SENSOR(S) TYPICAL CHARACTERISTICS (6) Measurement range (7) –40 Resolution Accuracy (8) 90 0.2 °C °C 25°C ±2 °C 0°C to 85°C ±2 °C PowerPump ELECTRICAL CHARACTERISTICS (FOR bq76PL102) (9) VOH High drive, PUMP1S, PUMP2S IOUT = 10 µA VOL Low drive, PUMP1S, PUMP2S IOUT = –200 µA VOH High drive, PUMP1N, PUMP2N IOUT = 200 µA VOL Low drive, PUMP1N, PUMP2N IOUT = –10 µA IOH Source current, PUMP1S, PUMP2S VOH = V1 – 0.8 V 250 µA IOL Sink current, PUMP1N, PUMP2N VOH = V1 + 0.2 V –250 µA tr Signal rise time CLoad = 300 pF 100 tf Signal FET fall time CLoad = 300 pF 100 fP Frequency PWM duty cycle (10) 0.9 V1 V 0.1 V1 0.9 V1 V V 0.1 V1 204.8 PUMP1S, PUMP2S 67% PUMP1N, PUMP2N 33% V ns ns kHz LDO VOLTAGE CHARACTERISTICS (11) Load = 200 µA at 25°C, V1 = 2.8 V VLDO Single-cell operation, referenced to VSS VLDO Dual-cell operation, V1 = V2 = cell voltage Load = 2 mA at 25°C 2.425 2.5 2.575 V 2.425 2.5 2.575 V VLAN SIGNALS (12) (13) (14) SDI, C coupling = 1000 pf 100 SDO 100 CL Load capacitance VIH Input logic high SDI 0.8 VLDO V VOH Output logic high SDO 0.9 VLDO V VIL Input logic low SDI 0.2 VLDO VOL Output logic low SDO 0.1 VLDO V tr Input rise time SDI 500 ns tf Input fall time SDI 500 ns tor Output rise time SDO 30 50 ns tof Output fall time SDO 30 50 ns (6) (7) (8) (9) (10) (11) (12) (13) (14) 6 pF V Typical for dual-diode (MMBD4148 or equivalent) external sensor using recommended circuit Range of diode sensors may exceed operation limits of IC and battery cells. Typical behavior after calibration; final result depends on specific component characteristics All parameters tested at typical cell voltages = 3.6 V. The frequency and duty cycle of each pump gate drive signal is set by the bq78PL114. The PUMPxN signals have a positive duty cycle and switch on the N-Channel MOSFETs. The duty cycle of the PUMPxS signals is (100 – the duty cycle of the PUMPxN signals). After calibration Values specified by design The SDI and SDO pins on the bq76PL102 are ac-coupled from the cell circuits downstream and upstream, respectively. The limits specified here are the voltage transitions which must occur within the SDI and SDO rise- and fall-time specifications. The value specified is over the full input voltage range and the maximum load capacitance. Submit Documentation Feedback Copyright © 2008–2009, Texas Instruments Incorporated Product Folder Link(s) :bq76PL102 bq76PL102 www.ti.com .......................................................................................................................................... SLUS887A – DECEMBER 2008 – REVISED OCTOBER 2009 FEATURE SET The bq76PL102 dual-cell li-ion battery monitor with PowerPump balancing implements battery voltage measurement, temperature measurement, and balancing for one or two Li-Ion cells in series, and any number in parallel (limited by other design considerations). Functions include: • Two external temperature sensors are supported • Simultaneous, synchronous measurement of all cell voltages in a series string • Asynchronous reporting of most-recent measurements for each cell • Fully independent measurements on a cell-by-cell basis • PowerPump cell balancing using charge transfer from cell to cell • PowerLAN isolated communications to other bq76PL102 devices or bq78PL114 master-gateway battery-management controller • Low-power operation Submit Documentation Feedback Copyright © 2008–2009, Texas Instruments Incorporated Product Folder Link(s) :bq76PL102 7 bq76PL102 SLUS887A – DECEMBER 2008 – REVISED OCTOBER 2009 .......................................................................................................................................... www.ti.com OPERATION Cell-Voltage Measurement Voltage measurements are made using one-per-cell precision delta-sigma analog-to-digital converters (ADC). An internal calibrated band-gap voltage reference is provided with each part. Measurements are performed when commanded by the bq78PL114 master-gateway battery-management controller via the one-wire PowerLAN serial communications bus. This allows all cells to be measured at exactly the same time under the same load conditions. Cell-Temperature Measurement Temperature measurements can be obtained using one internal and up to two external sensors. Each external sensor consists of one (or two for increased accuracy) series-connected diodes and a capacitor for filtering. The use of dual diodes in a single SMT package is recommended (MMBD4148SE or equivalent). The diode can be located up to 6 inches (15 cm) from the circuit board. The RF filter capacitor should be co-located very close to the diode to minimize unwanted noise coupling. The temperature measurement subsystem uses the same dual ADCs that are used for measuring voltages. Temperature measurements are fully independent of voltage readings, and are ordinarily interleaved at a fractional rate of the voltage readings by commands from the bq78PL114 master-gateway battery-management controller. Cell Balancing Balancing is provided among any number of supported cells. The bq76PL102 and PowerLAN family of master-gateway battery controllers is optimized for designs using more than four cells in series. The patented PowerPump reactive cell balancing dramatically increases the useful life of battery systems by eliminating the cycle life fade of multicell batteries due to cell imbalance. PowerPump efficiently transfers charge from cell to cell, rather than simply bleeding off charging energy as heat. Charge is moved from higher-capacity cells to lower-capacity ones, and can be moved as needed between any number of series cell elements. Balancing is performed during all battery operational modes – charge, discharge, and rest. Compared to resistive bleed balancing, virtually no energy is lost as heat. The actual balance current is externally scalable with component selection and can range from 10 mA to 1 A (100 mA typical) depending on application or cell requirements. (See the reference schematic, Figure 7.) Algorithms for cell balancing are centrally coordinated by the bq78PL114 PowerLAN master-gateway battery-management controller and directed across the array of bq76PL102 dual-cell Li-Ion battery monitors. Balancing is done in both directions by the bq76PL102s within the cell stack array: north or up the cell stack and south or down the cell stack. Each bq76PL102 node provides the circuitry to transfer (pump) the charge from cell to cell to provide balancing. The balancing algorithm is implemented in the bq78PL114 master-gateway battery controller, and commands are communicated to the bq76PL102s via the PowerLAN communications link. By tracking the balancing required by individual cells, overall battery safety is enhanced – often allowing early detection of internal micro-shorts or other cell failures. Cell balancing pumping, or charge transfer from one cell to another, is accomplished using a circuit that forms a simple flyback converter under control of the bq76PL102, which is in turn controlled by the master gateway. The outputs of PUMPnd (cell number, direction) control MOSFET transistors which charge an inductor from one cell and then discharge the inductor into an adjacent cell through the intrinsic body diode of the other MOSFET. • PUMP1S: Pumps charge from cell 1 to the next lower cell (closer to battery negative). This signal is unused by the first or lowest cell in the string. • PUMP1N: Pumps charge from cell 1 to cell 2. • PUMP2S: Pumps charge from cell 2 to cell 1 • PUMP2N: Pumps charge from cell 2 to the next higher cell in a pack (closer to battery positive). This signal is unused by the highest cell in the string. 8 Submit Documentation Feedback Copyright © 2008–2009, Texas Instruments Incorporated Product Folder Link(s) :bq76PL102 bq76PL102 www.ti.com .......................................................................................................................................... SLUS887A – DECEMBER 2008 – REVISED OCTOBER 2009 PowerLAN Communications PowerLAN communications technology is a patented serial network and protocol designed specifically for battery management in a multicell environment. PowerLAN is used to initiate and report measurements of cell voltage and temperature, as well as control cell balancing. Using only a capacitor, PowerLAN isolates voltages from adjacent bq76PL102 parts to permit high-voltage stack assemblies without compromising precision and accuracy. PowerLAN is expandable to support up to 12 cells in series, with each bq76PL102 handling two series cells. PowerLAN provides high ESD standoff and high immunity to noise generated by nearby digital circuitry or switching currents. Each bq76PL102 has both a PowerLAN serial input and serial output pin. Received data is buffered and retransmitted, permitting high numbers of nodes without loss of signal fidelity. Signals are capacitor-coupled between nodes to provide high dc isolation. Operation Modes The bq76PL102 normally operates in one of two modes: active or standby. The bq76PL102 is normally in standby mode and consumes typically less than 50 µA. The low-dropout regulator output is still functional in this mode, as are internal system protection functions (undervoltage, communications timeout, etc.) When a PowerLAN communications event occurs, then the bq76PL102 transitions to active mode and current drain increases to 250 µA typically. The bq76PL102 stays in this mode to complete any measurements or cell-balancing pumping operations. Once activity in this mode ceases, the return to standby is automatic, thus reducing overall power consumption. An undervoltage ultralow-current mode is also available when initiated by the bq78PL114 master-gateway battery controller and when the cell voltages drop below a preset threshold. This mode is used to preserve battery capacity during long periods of non-use and therefore has a current drain of approximately 1 µA. Note that cell balancing currents are external to the bq76PL102 and may be sized according to the needs of the application (typically 10 mA to 1 A). These currents are fixed by the cell-balancing circuitry and only enabled or disabled by the bq76PL102 (under control of the bq78PL114) to achieve the necessary cell-balance operations. COMPLEMENTARY PRODUCTS PowerLAN Master Gateway Battery Controller The bq78PL114 master-gateway battery-management controller with PowerPump cell balancing from Texas Instruments is the central controller for a complete multicell battery system. This advanced master-gateway battery controller works with up to 12 series cells monitored by bq76PL102 cell monitors to provide battery voltage, temperature, current and safety monitoring; state-of-charge and state-of-health information; system-wide internal PowerLAN communications; as well as external communications of battery parameters via the industry-standard SMBus interface. Submit Documentation Feedback Copyright © 2008–2009, Texas Instruments Incorporated Product Folder Link(s) :bq76PL102 9 bq76PL102 SLUS887A – DECEMBER 2008 – REVISED OCTOBER 2009 .......................................................................................................................................... www.ti.com PowerLAN Six-Cell Battery Monitor RPRE + PACK+ – PACK– V1 PRE CHG DSG CELL 6 V2 bq76PL102 Cell Balancing Circuits Level-Shift Circuits SDI1 P-LAN SDO0 CELL 5 VLDO1 V4 RSTN Cell Balancing Circuits CELL 4 CELL 3 CELL 2 V3 SPROT VLDO2 bq78PL114 PowerLAN Gateway Battery LED1–LED5 Management Controller V2 5 SMBCLK Temperature Sensor (typ.) SMBDAT SMBus CELL 1 ESD Protection V1 XT1, XT2 Temperature Sensor (typ.) SDO2 XT3, XT4 Typical six-cell configuration shown. Additional cells added via PowerLAN connection. Some components omitted for clarity. CSPACK CCPACK CCBAT One of 2 external sensors shown CSBAT SDI3 CRFI Thermal Pad One of 2 external sensors shown VSS CRFI RSENSE S0342-03 Figure 4. bq78PL114 Simplified 6-Cell Gateway Controller Circuit With bq76PL102 10 Submit Documentation Feedback Copyright © 2008–2009, Texas Instruments Incorporated Product Folder Link(s) :bq76PL102 bq76PL102 www.ti.com .......................................................................................................................................... SLUS887A – DECEMBER 2008 – REVISED OCTOBER 2009 + V1 n + 1 PUMP1S (Next part above) To Node n + 1 – V1 n + 1 To Node n + 1 PowerPump™ Circuit 1 + V2 Typical 2 cell circuit shown, some components omitted for clarity. V2 n 20k bq76PL102 15µH PowerLAN™ 3300pF 1 2k SDI + PUMP2N 0.001 SDO 1 3300pF 20k – V2 n V1 + V1 n 20k PUMP2S + 15µH 3300pF 1 2k XT1, XT2 Typical Temperature Sensor MMBD4148SE 0.001 VPP VLDO 1 PUMP1N 1 3300pF PUMP1S 20k – VSS Power Pad V1 n To Node n – 1 PUMP1S (Next part below) To Node n – 1 + V2 n – 1 S0388-01 Figure 5. bq76PL102 Simplified Example Operating-Circuit Diagram Submit Documentation Feedback Copyright © 2008–2009, Texas Instruments Incorporated Product Folder Link(s) :bq76PL102 11 bq76PL102 S001 SLUS887A – DECEMBER 2008 – REVISED OCTOBER 2009 .......................................................................................................................................... www.ti.com Figure 6. Higher-Balancing-Current bq76PL102 Operating-Circuit Diagram 12 Submit Documentation Feedback Copyright © 2008–2009, Texas Instruments Incorporated Product Folder Link(s) :bq76PL102 CELL1 CELL2 CELL3 CELL4 CELL5 CELL6 CELL7 CELL8 CELL9 CELL10 - + CELL1 - + CELL2 - + CELL3 - + CELL4 - + CELL5 - + CELL6 - + CELL7 - + CELL8 - + CELL9 - + CELL10 C51 10uF C53 10uF C54 10uF C94 10uF C29 10uF P6N P6S P5N P5S P8N P8S P7N P7S P10S P9N P9S C95 10uF 8 7 6 5 15 12 8 7 6 5 15 12 8 7 6 5 15 12 P2N P2S P1N P1S V1 13 14 13 14 13 0.01uF C48 N/C 3 N/C 10 N/C 11 16 VPP 2 VLDO T2 T1 9 0.01uF C10 N/C 3 N/C 10 N/C 11 16 VPP 2 VLDO T2 T1 9 0.01uF C49 N/C 3 N/C 10 N/C 11 BQ76PL102 V2 U3 P2N P2S P1N P1S V1 T2 14 16 VPP 2 VLDO BQ76PL102 V2 U2 P2N P2S P1N P1S V1 T1 9 BQ76PL102 V2 U6 SDO 1 VSS 17 TAB SDI 4 SDO 1 VSS 17 TAB SDI 4 C9 10uF C52 C46 10uF C55 C92 10uF C96 T6 0.01uF T7 0.01uF T11 0.01uF C45 C57 C98 T5 0.01uF T8 0.01uF T12 0.01uF 12.0 VDC ZR1 VLDO1 VSS Q8 R40 R45 R5 100K 10K R44 100K Q9 R41 200K 560K C27 1.0M R46 0.1uF C43 C11 0.01uF 0.01uF 10uF C5 P4N P4S P3N P3S P2N P2S P1N VSS 1.0uF C39 1.0uF C40 1.0uF C41 1.0uF C44 C61 VSS 10uF C28 P4N P4S P3N P3S P2N P2S P1N VSS V1 V2 V3 V4 VLDO2 U4 25 8 30K R58 1.0M R59 ZR2 9 C3 4.7K 4.7K Various R3 1.0uF R27 C7 0.01uF R28 6 12 OSCO RSTN 38 37 28 27 26 OSCI 11 SMBDAT SMBCLK N/C N/C N/C 5 EFCID 4 EFCIC 29 31 33 32 36 35 34 40 XT4 41 XT3 45 XT2 46 XT1 LED5/SEG5 LED4/SEG4 LED3/SEG3 LED2/SEG2 LED1/SEG1 LEDEN/PSH/BP/TP FIELD 12.0 VDC bq78PL114S12 Q11 VLDO1 24 P-LAN 19 SDI3 18 SDO2 14 SDI1 13 SDO0 23 22 21 20 17 16 15 48 47 44 42 39 43 VSS Q12 200K R56 560K R53 Q13 CSBAT 0.1uF DSG 1 CHG 2 CCBAT SDO 1 VSS 17 TAB SDI 4 30 SPROT 3 PRE CCPACK C60 CSPACK 0.1uF TAB 49 Product Folder Link(s) :bq76PL102 7 Copyright © 2008–2009, Texas Instruments Incorporated 10 Q10 S1 R19 1.0M R6 R25 1.0M VSS 1.0M 100R R49 D24 D25 D26 D27 D23 100K R52 PACK- VSS R16 1.0M R17 R18 100R 1.0M R43 BC846ALT1G 200K R50 100R R15 Q15 12.0 VDC ZR3 Q16 R51 1.0M T1 C16 T3 C37 Z1 0.01uF 0.01uF 100R R54 0.01uF T2 0.01uF 5.6VDC 100R R55 C8 C6 T4 0.1uF C42 0.1uF C50 1 2 3 4 S001 SMBUS-PORT VSS PACK+ www.ti.com .......................................................................................................................................... SLUS887A – DECEMBER 2008 – REVISED OCTOBER 2009 bq76PL102 Figure 7. Reference Schematic (Sheet 1 of 2) Submit Documentation Feedback 13 14 CELL8 CELL9 CELL10 C1 22uF C13 22uF C17 22uF L2 2.0K R9 4.7uH L1 2.0K R12 4.7uH D5 D6 D7 D8 R10 R11 R13 R14 20K Q1-A Q1-B 20K 20K Q2-A Q2-B 20K 3300pF C12 3300pF C2 3300pF C15 3300pF C14 P8N P9S P9N P10S Submit Documentation Feedback Product Folder Link(s) :bq76PL102 CELL1 CELL2 CELL3 CELL4 CELL5 CELL6 CELL7 22uF C90 22uF C91 C67 22uF C70 22uF C73 22uF C76 22uF VSS C62 22uF 2.0K R2 4.7uH L8 2.0K R8 4.7uH L9 2.0K R23 4.7uH L10 2.0K R47 4.7uH L11 2.0K R61 4.7uH L12 2.0K R64 4.7uH L13 2.0K R67 4.7uH L14 D1 D2 D3 D4 D19 D20 D21 D22 D28 D29 D30 D31 D32 D33 20K 20K 20K 20K 20K 20K 20K 20K 20K 20K Q18-A Q18-B R21 Q19-A Q19-B R22 R26 Q20-A Q20-B R42 R48 Q21-A Q21-B R57 R62 Q22-A Q22-B R63 20K Q23-A R65 R4 20K Q23-B R66 20K Q24-A R68 R7 20K Q24-B R69 C77 3300pF C59 3300pF C58 3300pF C64 3300pF C63 3300pF C66 3300pF C65 3300pF C69 3300pF C68 3300pF C72 3300pF C71 3300pF C75 3300pF C74 3300pF C78 3300pF S002 P1N P2S P2N P3S P3N P4S P4N P5S P5N P6S P6N P7S P7N P8S bq76PL102 SLUS887A – DECEMBER 2008 – REVISED OCTOBER 2009 .......................................................................................................................................... www.ti.com Figure 8. Reference Schematic (Sheet 2 of 2) Copyright © 2008–2009, Texas Instruments Incorporated PACKAGE OPTION ADDENDUM www.ti.com 12-Nov-2009 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Drawing Pins Package Eco Plan (2) Qty BQ76PL102RGTR ACTIVE QFN RGT 16 3000 Green (RoHS & no Sb/Br) CU NIPDAU Level-3-260C-168 HR BQ76PL102RGTT ACTIVE QFN RGT 16 250 CU NIPDAU Level-3-260C-168 HR Green (RoHS & no Sb/Br) Lead/Ball Finish MSL Peak Temp (3) (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. PREVIEW: Device has been announced but is not in production. Samples may or may not be available. OBSOLETE: TI has discontinued the production of the device. (2) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability information and additional product content details. TBD: The Pb-Free/Green conversion plan has not been defined. Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes. Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above. Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material) (3) MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature. Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals. 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